<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body{
            margin:0;
        }
        .main{
            padding:0 200px 0 200px;
        }
        .left,.right,.center{
            float:left;
            height:100px;
        }
        .center{
            width:100%;
            background:slateblue;
            height:200px;
        }
        .left{
            width:200px;
            background:springgreen;
            margin-left:-100%;
            position:relative;
            left:-200px;
        }
        .right{
            width:200px;
            background:yellowgreen;
            margin-left:-200px;
            position:relative;
            left:200px;
        }
        
    </style>
</head>
<body>
    <div class="main">
        <div class="center">center</div>
        <div class="left">left</div>
        <div class="right">right</div>
    </div>
</body>
</html>